I think this was just a plot device used to get away with reincarnation restrictions in china. Correct me if Im…
reasons behind it: 1) there was a case a few years ago, where two teenage girls in China committed sui*cide thinking they could time travel 2) potential for changing history/historical nihilism/etc but there are ways around it and hmm seems like the modern day person travel to the past is not well liked however the last few years time travel is seemed to be allowed in some areas again (love in time, lost track of time was surprisingly allowed, and the subtle time travel element in the xianxia till the end of the moon was allowed) but other areas aren't with elements: such as travel into novel isn't allowed as much anymore (scent of time, romance of a twin flower)
1 
there's post production (cgi etc) they need to work on
refer to @keykeykeykey's commment
she is the unofficial wife/concubine of fl's father
1) there was a case a few years ago, where two teenage girls in China committed sui*cide thinking they could time travel
2) potential for changing history/historical nihilism/etc but there are ways around it and hmm seems like the modern day person travel to the past is not well liked
however the last few years time travel is seemed to be allowed in some areas again (love in time, lost track of time was surprisingly allowed, and the subtle time travel element in the xianxia till the end of the moon was allowed) but other areas aren't with elements: such as travel into novel isn't allowed as much anymore (scent of time, romance of a twin flower)